The half-life of 222 Rn is 3.83 days. (a) Convert the half-life to seconds. 1 s

Question

The half-life of 222Rn is 3.83 days. (a) Convert the half-life to seconds.
1 s

(b) Calculate the decay constant for this isotope.
2 s-1

(c) Convert 0.43 µCi to the SI unitthe becquerel.
3 Bq

(d) Find the number of 222Rn nuclei necessaryto produce a sample with an activity of 0.43 µCi.
4222Rn nuclei

(e) Suppose the activity of a certain 222Rn sample is6.10 mCi at a given time. Find the numberof half-lives the sample goes through in 40.2 d and the activity atthe end of that period.
5 half-lives
6 mCi (a) Convert the half-life to seconds.
1 s

(b) Calculate the decay constant for this isotope.
2 s-1

(c) Convert 0.43 µCi to the SI unitthe becquerel.
3 Bq

(d) Find the number of 222Rn nuclei necessaryto produce a sample with an activity of 0.43 µCi.
4222Rn nuclei

(e) Suppose the activity of a certain 222Rn sample is6.10 mCi at a given time. Find the numberof half-lives the sample goes through in 40.2 d and the activity atthe end of that period.
5 half-lives
6 mCi

Explanation / Answer

Given   half life of   222Rn    

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